KR100574604B1 - Aparatus for controling air conditioner capable of mixing and circulating room air and outside air and defrosting function, and method there of - Google Patents

Abstract

The present invention is a defrost related to a control device and a method for controlling the control device to optimize and control the air conditioner configured to prevent the waste heat defrosting when entering the room when defrosting the heat exchanger using the waste heat circulating the room during heating The present invention relates to a control device and a control method of an internal and external air mixing circulation type air conditioner having a function.

To this end, the present invention, the inside and the outside air is introduced at the same time to perform the heating and cooling air conditioning, the defrost generated in the heat exchanger during heating is performed by the waste heat of the bet circulated through the room, the waste heat defrosting is introduced into the room In the air conditioner having a defrost configuration to prevent the occurrence of, the keypad is provided for setting the drive of each component when performing the air conditioning and defrosting, and detects the detected signal by sensing the temperature of the indoor and outdoor, respectively An input unit comprising a temperature sensing unit for inputting; A control unit for controlling the fan applied to the internal and external air by receiving the signal of the input unit, the damper for controlling the inflow and the branching of the internal and external air, and the heater applied as auxiliary heat source of the waste heat during defrosting by time and temperature, respectively; Provided is a control device for an internal and external air mixing circulation type air conditioner having a defrost function, comprising a drive unit for driving a fan, a damper, and a heater by a control signal of the controller.

In addition, the present invention, the inside and the outside air is introduced at the same time to perform the heating and cooling air conditioning, the defrost generated in the heat exchanger during heating is performed by the waste heat of the inside air circulated in the room, the waste heat defrosting is introduced into the room In the process of controlling the air conditioner having a defrost configuration to prevent the occurrence of, the temperature is detected inside and outside the device when the device is driven, and when the outside temperature is below the set temperature, by setting the number of defrosting operation Blocking the inflow of outside air and enclosing the inside air circulation side and driving an exhaust fan to circulate the waste heat of the inside air to a heat exchanger requiring defrosting; Counting the number of times the waste heat is circulated to the heat exchanger, and if the counted number of operations is equal to or greater than the set number of times, performing normal air conditioning driving to stop the defrosting operation; Defrosting characterized in that the step of performing the defrosting operation according to the temperature of the outside air to the set number of times, if the elapsed time counted by the normal air conditioning driving time is equal to or greater than the set time Provided is a control method of a control device of an internal and external air mixing circulation type air conditioner having a function.

Air Conditioning, Defrost, Control, Damper, Chamber

Description

Aparatus for controling air conditioner capable of mixing and circulating room air and outside air and defrosting function, and method there of}             

1 is a piping diagram of an air conditioner to which a control device according to the present invention is applied.

2 is a block diagram of a control device according to the present invention.

3 is an exemplary view in which the air conditioner is driven by the control device according to the present invention.

4 is a flow chart of a process in which the defrosting operation is performed in the air conditioning process of FIG.

5 is a flowchart illustrating a process in which each driving unit is driven when the defrost of FIG. 4 is performed.

6 is an exemplary view illustrating a state in which defrosting operation is performed by the process of FIG. 5.

<Explanation of symbols for the main parts of the drawings>

10: case 12: heat exchanger

20: heat exchanger unit 30: bet chamber

40: damper 50: outside air inlet

60: defrosting unit 70: control circuit

71: input unit 72: microprocessor

73: drive unit

The present invention relates to a control device and a control method of an internal / external air mixed circulation air conditioner having a defrost function. Specifically, the waste heat obtained by performing defrost when defrosting a heat exchanger using waste heat circulated in a room during heating is The present invention relates to a control device for optimizing and controlling an air conditioner configured to not enter a room, and a method of controlling the control device.

In recent years, by recovering cold and warm heat circulated into the room, absorbing the outside air, and mixing and circulating properly, the development of a ventilation recovery rate adjustable air-conditioning air conditioner to realize a lower power consumption and simpler configuration, and to increase the heating and cooling efficiency It is done.

Such an air conditioner forms a separate chamber for collecting indoor and outdoor air (hereinafter, referred to as bet and outdoor) in the inside of the case. And the rest is exhausted.

In addition, the air conditioner is equipped with a defrosting structure for removing the frost generated on the evaporator which is a heat exchanger of the exhaust side part of the waste heat circulated in the room during heating.

Such a defrosting configuration is provided by branching from an internal air circulation duct communicating with the interior of the case and having a defrosting duct, wherein the defrosting duct communicates with the circulation duct and the exhaust chamber provided with the exhaust fan.

That is, the waste heat introduced into the bet chamber passes through the heat exchanger to remove frost on the heat exchanger, and the waste heat that has been defrosted by the exhaust fan is collected back into the bet chamber through the defrost duct and the circulation duct to defrost the first cycle. Will form.

Here, the defrost is to perform the defrost of the desired degree by circulating the waste heat circulated in the room several cycles, such defrost is performed a predetermined number of times every time by the control configuration for controlling the device.

In the above-described conventional air conditioner, since waste heat from which defrosting is performed is collected in the bet chamber again and partially circulated and partially exhausted, contaminants such as dust accumulated on the exhaust side during the defrosting process are also introduced into the room to contaminate indoor air. .

The polluted air thus provides a health disadvantage for indoor residents, and causes a problem of frequent failure of the circulation fan circulating the bet according to the inflow of pollutants.

In addition, the defrost control by the control configuration is set to uniformly set the number of times to perform the defrost only for each time zone, accordingly the defrost process is controlled in a constant driving state irrespective of temperature, so the temperature difference for each time zone is severe Or the problem is difficult to expect the desired defrosting effect in winter.

The present invention has been invented to solve the above-described problems, to control the configuration to prevent the waste heat applied to the defrost re-introduced into the room when performing the defrost by using the waste heat of the bet, the defrost control by time zone It is an object of the present invention to provide a control device of an air conditioner that is controlled to be divided by temperature.

Another object of the present invention is to provide a control method for performing drive control and defrost control of an air conditioner by the control device.

In order to achieve the above object, the present invention has the configuration of the following features.

The present invention performs air conditioning and air conditioning by introducing the inside and the outside air at the same time, while performing frost removal generated in the heat exchanger during heating by waste heat of the inside circulating the inside, to prevent the waste heat defrosting is introduced into the room In the air conditioner having a defrost structure,

An input unit provided with a keypad for setting the driving of each component when performing air conditioning and defrosting, and having a temperature sensing unit for sensing and detecting a temperature inside and outside of the air to input a detected signal; A control unit for controlling the fan applied to the internal and external air by receiving the signal of the input unit, the damper for controlling the inflow and the branching of the internal and external air, and the heater applied as auxiliary heat source of the waste heat during defrosting by time and temperature, respectively; The control unit comprises a drive unit for driving a fan, a damper, and a heater.

In order to achieve the above another object, the present invention has the configuration of the following method.

The present invention performs air conditioning and air conditioning by introducing the inside and the outside air at the same time, while performing frost removal generated in the heat exchanger during heating by waste heat of the inside circulating the inside, to prevent the waste heat defrosting is introduced into the room In the process of controlling the air conditioner having a defrost configuration,

When the device is driven, it senses the temperature inside and outside of the device, and when the outside temperature is below the set temperature, the number of defrosting operation is set to block the inflow of outside air, and the exhaust fan is closed after separating the inside circulation. Circulating the waste heat of the bet by a heat exchanger requiring defrosting; Counting the number of times the waste heat is circulated to the heat exchanger, and if the counted number of operations is equal to or greater than the set number of times, performing normal air conditioning driving to stop the defrosting operation; And counting the normal air conditioning driving time and performing the defrosting operation according to the temperature of the outside air, if the elapsed time counted is equal to or greater than the set time.

Hereinafter, exemplary embodiments of the present invention to which the above configuration is applied will be described in detail with reference to the accompanying drawings.

1 is a piping diagram of an air conditioner to which a control device according to the present invention is applied, and FIG. 2 is a block diagram of a control circuit unit for driving control of the air conditioner of FIG.

The configuration of the drawings is shown in the "applied internal and external air circulation circulation system having a defrost function" of the patent application No. 2004-0098086 filed on November 26, 2004, the applicant.

The air conditioner includes a case 10, a heat exchanger unit 20, an indoor chamber 30, a damper 40, an outside air inlet unit 50, a defroster unit 60, and a control circuit unit 70. .

The case 10 is formed to communicate with the room (R) and the circulation duct 11 is configured to form a track for circulating the indoor air, the heat exchanger unit 20 is formed on both sides of the inside of the case 10 The heat exchanger 12 implements the installed evaporator and the condenser, and a circulation fan 13 installed at each outside of the heat exchanger 12 to circulate the internal air and the exhaust fan 14 to exhaust the outside air.

The bet chamber 30 is formed by partitions 31 formed on both sides of the circulation duct 11 in which bets are circulated and introduced into the case 10, and the heat exchangers 12 and the partition walls 31 of both sides are formed. The space between is formed by the circulation mixing chamber 15 and the exhaust mixing chamber 16.

The dampers 40 are installed on both side walls 31 of the bet chamber 30, respectively, and the dampers 40 perform the passage / blocking of air by separate driving means (not shown). 40 shows a configuration in which the rate at which air is blown to both sides can be set according to the degree of open space for air to pass therethrough.

The outside air inlet 50 includes an outside air inlet duct 51, a branch duct 52, and a branch damper 53.

The outside air inlet duct 51 is formed so that the outside air flows into the exhaust mixing chamber 16 inside the case 10, and is provided with an outside air damper 54 to control the inflow of the outside air, and the branch duct 52 is provided. Branched from the outside air inlet duct 51 is formed to communicate with the circulation mixing chamber (15).

The branch damper 53 of the branch duct 52 or the branch duct 52 and the outside air inlet duct 51 to set the degree of branching the outside air introduced into the outside air inlet duct 51 into the branch duct 52. It is constructed by being coupled to branch points

The defroster unit 60 includes a defrost duct 61 and switching dampers 62 and 63, and the defrost duct 61 is branched from the outside air inlet duct 51 communicating with the exhaust mixing chamber 16. And it is formed to communicate with the exhaust duct 18 drawn out from the exhaust chamber (17).

The switching dampers 62 and 63 are respectively coupled to the defrost duct 61 and the exhaust duct 18 so as to be selectively opened / closed during defrost or exhaust using the waste heat of the bet.

In addition, the defroster 60 is configured to be provided with a heater 64 at the end of the exhaust mixing chamber 16 side of the outside air inlet duct 51 as an auxiliary heat source when the heat exchanger 12 is defrosted.

The control circuit unit 70 includes an input unit 71, a microprocessor 72 as a control unit, and a driving unit 73.

The input unit 71 is a keypad 74 provided to set driving of each component unit when performing air conditioning and defrosting, and a thermistor which is a temperature sensing unit for detecting and detecting a temperature of an interior and an exterior, respectively, and inputting a detected signal. It consists of 75.

The microprocessor 72 receives the signal from the input unit 71 and dampers 40, 53, 54, 62 for each fan 13 and 14 through which internal and external air advances, and the inflow and branching of internal and external air. , 63), it is configured to control the heater 64, which is applied as auxiliary heat source of the waste heat during defrosting by time and temperature, respectively.

Here, the microprocessor 72 includes a memory 76 for inputting air conditioning and defrost data for each time and temperature, and a timer 77 for counting the time of each driving unit during air conditioning and defrost driving.

In addition, the microprocessor 72 includes a monitor such as an LCD 72a for displaying the driving state of each driving unit and the input state of the input unit 71 to the outside.

The driver 73 receives the control signal of the microprocessor 72 and drives the heater 64, the dampers 40, 53, 54, 62, 63, and the fans 13 and 14, which are the driving components of the device, respectively. Drive drivers 78, 79, and 80, respectively.

3 is an exemplary view of an air conditioner in which the air conditioner according to the present invention performs cooling and heating.

Referring to FIG. 3, the air conditioning is the initial driving of the device at a time point at which the refrigerant circulates through the heat exchanger 12 of the heat exchanger unit 20. After that, the circulation fan 13 and the exhaust fan ( 14) is driven to circulate the bet in the direction of the arrow in the figure.

At this time, the bet is performed by the circulation fan 13 to perform the indoor air conditioning and air conditioning is collected in the bet chamber 30, the collected bet is part of the remaining bet by the branch ratio of the damper 40, the remaining portion to the bet circulation side Some will go to the exhaust side.

At the same time, the outside air is also introduced through the outside air inlet duct 51 from the outside air inlet 50. At this time, the outside air is controlled by the opening and closing amount of the branch damper 53. Through (52), the process proceeds by branching at a certain rate (the rate corresponding to the rate at which the bet is diverted to a known matter).

The internal and external air branched in this way are mixed in the circulation mixing chamber 15 and the exhaust mixing chamber 16, respectively, and the air mixed in the circulation mixing chamber 15 is circulated to the bet by the circulation fan 13 and exhausted. The air mixed in the mixing chamber 16 is exhausted to the outside by the exhaust fan 14.

Here, it is natural that the air mixed in the circulation mixing chamber 15 passes through the heat exchanger 12 to perform the desired cooling and heating.

4 is a flow chart of a process in which defrosting is performed during heating while air conditioning is being performed as in FIG. 3.

Referring to FIG. 4, when the driving of the device is turned on by the manipulation of the keypad 74, the microprocessor 72 causes the device to perform an air conditioning process as shown in FIG. 3 (S10).

At the same time, the thermistor 75 senses the temperature inside and outside the device (S20) when the temperature outside the temperature is less than the set temperature, by setting the number of defrosting operation to block the inflow of outside air and the airtight circulation side sealed Thereafter, the exhaust fan 14 is driven to circulate the waste heat of the bet to the heat exchanger 12 requiring defrosting to perform defrosting operation (S30).

When the defrosting operation is started, the microprocessor 72 counts the number of times the waste heat is circulated to the heat exchanger 12, and when the counted operation number is equal to or greater than the set number of times, (S40) to stop the defrosting operation. Perform normal air conditioning drive (S50).

Here, when the counted operation number is less than the set number of times, the microprocessor 72 allows the above defrosting operation to be performed until at least the same as the set number of times.

Thereafter, the normal air conditioning driving time is counted by the timer 77 in the microprocessor 72. (S60)

When the counted elapsed time is equal to or greater than the set time, the process of performing defrosting operation according to the temperature of the outside air at a set number of times (S30) is performed (S70) to control the normal air conditioning and defrosting operation process. It is.

Here, when the counted elapsed time is shorter than the set time, the microprocessor 72 allows the normal air conditioning process to be performed until the counted time is at least equal to the set time.

For reference, the temperature and time conditions for performing the defrosting is performed once for 4 to 5 minutes after performing air conditioning for 1 hour when the ambient temperature is 5 ℃ ~ 0 ℃, 1 hour when 0 ℃ ~ -5 ℃ 2 times for 4 ~ 5 minutes after air conditioning, 1 hour at -5 ℃ ~ -10 ℃ 3 times for 4 ~ 5 minutes after air conditioning, 4 ~ 5 hours after air conditioning for 1 hour at temperature below -10 ℃ Preference is given to performing four times in minutes.

5 is a flowchart illustrating a process in which each driving unit is driven when the defrosting operation is performed as described above, and FIG. 6 is an exemplary view illustrating a state in which the defrosting operation is performed by the process of FIG. 5.

5 and 6, in the process of performing the defrosting operation (S30), when a signal of the defrosting operation is input by the time and temperature control of the microprocessor 72 (S31), the fan driving driver 80 is operated. The exhaust fan 14 is stopped (S32), and the exhaust side damper 40, the outside air damper 54, the exhaust damper 63 and the branch damper 53 of the bet chamber 30 through the damper driving driver 79. ) Are respectively closed and the defrost damper 62 is opened. (S33)

When the dampers are opened / closed in this manner, the internal chambers 30 and the exhaust mixing chamber 16 are hermetically sealed to each other, and the exhaust mixing chamber 16 and the exhaust chamber 17 separated by the heat exchanger 12 are separated. And only the defrost duct 62 is maintained in communication.

Thereafter, when the exhaust fan 14 is operated (S34) and the waste heat of the collected bet is circulated on the exhaust side before being enclosed, the defrost process in which the frost generated on the surface of the heat exchanger 12 is removed by the waste heat. This is to be done.

Here, when the temperature of the waste heat is low or the temperature of the outside is extremely low, when the amount of frost generation on the surface of the heat exchanger 12 is large, the heater 64 interfering with the waste heat circulation section is operated for more efficient defrosting (S35). The defrosting operation is performed. (S36)

As described above, the present invention, by controlling the device to prevent the waste heat circulated in the room during the defrosting operation to be re-introduced into the room after performing the defrosting to eliminate the pollution of the indoor air, to maintain a comfortable indoor space In addition, by preventing the malfunction of the circulation fan due to pollutants, it is possible to solve the time and economic disadvantages caused by the maintenance of the device.

In addition, the present invention is to control the defrosting to be controlled separately for each temperature by time, there is an effect that can achieve a more ideal defrosting results in the season and winter season when extreme temperature difference occurs.

Claims (3)

The inside and the outside air are introduced at the same time to perform air conditioning and air conditioning, and during heating, defrost generated by the heat exchanger 12 is performed by the waste heat of the bet circulating in the room R, but the waste heat in which defrosting is performed is performed indoors ( In the air conditioner having a defrost structure to prevent the flow into R), A keypad 74 is provided to set driving of each component when performing air conditioning and defrosting, and includes a temperature sensing unit 75 that detects and detects indoor and outdoor temperatures and inputs a detected signal. An input unit 71; Fans 13 and 14 for receiving the signal of the input unit 71 to advance internal and external air, dampers 40, 53, 54, 62, and 63 for inflow of internal and external air, and branching, and during defrosting. A control unit 72 for controlling the heater 64 applied as an auxiliary heat source of waste heat by time and temperature, respectively; Defrost function, characterized in that consisting of a drive unit 73 for driving the fan (13, 14), dampers (40, 53, 54, 62, 63), the heater 64 by the control signal of the control unit (72). Control device of internal and external air mixing circulation air conditioner having. The inside and the outside air are introduced at the same time to perform air conditioning and air conditioning, and during heating, defrost generated by the heat exchanger 12 is performed by the waste heat of the bet circulating in the room R, but the waste heat in which defrosting is performed is performed indoors ( In the process of controlling the air conditioner having a defrost configuration to prevent the flow into R), When the device is driven, the temperature is sensed inside and outside the device, and when the outside temperature is below the set temperature, after setting the number of defrosting operations, the exhaust fan 14 is stopped and the respective dampers 40, Opening, closing 53, 54, 62, and 63 to hermetically separate the internal circulation side and the exhaust side; When the air circulation side and the exhaust side are sealed, the exhaust fan 14 is operated to circulate the waste heat of the collected bet before the air is separated from the exhaust side, and a heater installed so as to interfere with the circulation section of the waste heat is exchanged. (12) circulating the waste heat of the bet comprising removing the surface frost to the heat exchanger 12 requiring defrosting; Counting the number of times the waste heat is circulated to the heat exchanger (12) and performing normal air conditioning driving to stop the defrosting operation if the counted operation number is equal to or greater than the set number of times; Defrosting characterized in that the step of performing the defrosting operation according to the temperature of the outside air to the set number of times, if the elapsed time counted by the normal air conditioning driving time is equal to or greater than the set time Control method of the control device of the internal and external air mixing circulation type air conditioner having a function. delete

Images